可数/不可数
instruction
n.
1.教学,讲授;教育[U][(+in)]
She gives instruction in mathematics.
她讲授数学.
2.教诲;教导[U]
3.命令,指示[P1][+to-v][+(that)]
They had carried out my instructions to the letter.
他们严格地按我的指示把事办了.
4.用法说明;操作指南[P]
I read the instructions on the bottle.
我读了瓶子上的用法说明.